Missy Franklin

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FILE - In this July 30, 2012, file photo, United States' Missy Franklin poses with her gold medal for the women's 100-meter backstroke swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London. Missy Franklin is so upbeat, so full of energy, so dang positive all the time, it's hard to imagine her ever going to a dark place. (AP Photo/Michael Sohn, File)

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FILE - In this Aug. 8, 2016, file photo, United States' Missy Franklin reacts after placing last in a women's 200-meter freestyle semifinal during the swimming competitions at the 2016 Summer Olympics in Rio de Janeiro, Brazil. At 17, she was the darling of the Olympics, a bubbly teenager who swam in seven events at London and captured four golds and a bronze. Four years later, she barely qualified for the U.S. team, ceded a starring role to Katie Ledecky, and didn't come close to winning an individual medal. (AP Photo/Martin Meissner, File)

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FILE - In this Aug. 3, 2012, file photo, Missy Franklin, of the United States, reacts to her gold medal win in the women's 200-meter backstroke final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London. Missy Franklin is so upbeat, so full of energy, so dang positive all the time, it's hard to imagine her ever going to a dark place. (AP Photo/Michael Sohn, File)

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Members of the California 800 freestyle relay team, Rachael Acker, Elizabeth Pelton, Missy Franklin and Caroline Piehl, celebrate after winning the race at the NCAA women's swimming and diving championships in Minneapolis, Friday, March 21, 2014. (AP Photo/Andy Clayton-King)